Patent attributes
This optical receptacle comprises: a first optical surface on which light emitted from a VCSEL is incident; a first reflection part which reflects, as monitor light traveling to a detection element; a light separation part which separates monitor light and signal light; a second optical surface which emits the signal light to the end surface of the optical transmission body; and a third optical surface which emits the monitor light reflected by the first reflection part and the monitor light separated by the light separation part to the detection element. Two second reflection parts of the light separation part are disposed so as to be located within a luminous flux of the light incident on the first optical surface such that a predetermined condition is satisfied.